How do you organize rack?

[Jon Massey]

Didn't realise there were datacentres with dual-voltage supplies. I've only ever come across 240V. I can see why you'd want physically incompatible plugs for different voltages.

 

[aero]

Datacenters can typically provide you with any power type you require. ..
120v or 208v
20amp or 30amp
Single phase or 3 phase

That being said. ...I've never seen enterprise grade gear that can't operate between 110v-240v...it's pretty ubiquitous these days.

 

[Jon Massey]

Never seen 120 or 208 but I'm guessing it's available at most places on request. Single-phase 240V, two feeds, as many amps as you want to pay for seems to be the standard round these parts.

 

[aero]

I guess I should have specified...those are the most common voltages in US datacenters.